加压气固喷射器内静压分布特性的试验研究  

Experimental Research on Static Pressure Distribution Characteristics in a Pressurized Gas-solid Injector

作　　者：熊源泉[1] 章名耀[1] 

机构地区：[1]东南大学洁净煤发电和燃烧技术教育部重点实验室,江苏南京210096

出　　处：《热能动力工程》2004年第2期148-152,共5页Journal of Engineering for Thermal Energy and Power

基　　金：国家重点基础研究基金资助项目(G199902210535);国家"863"计划基金资助项目(2003AA522030).

摘　　要：在增压气力输送系统试验装置上,对影响收缩型气固喷射器内静压分布特性的关键因素作了较深入地研究。试验研究结果表明,静压在气固喷射器收缩段入口处明显急剧上升。气固喷射器内静压随气体喷嘴位置S的增大而减小,而随收缩角α的增大而有所提高。提高气体喷嘴出口速度,气固喷射器内的最大静压值由喷射器收缩段入口处附近迁移至喷射器收缩段出口处附近。此外,气体喷嘴位置、收缩段的收缩角和输送风对收缩型气固喷射器内的静压分布的影响还与系统背压相关联。On the test facility of a supercharged pneumatic conveying system an in-depth investigation was performed of the key factors, which have an impact on the static-pressure distribution characteristics in a convergent type of gas-solid injectors. The results show that a sharp rise in static pressure occurs at the inlet of the convergent section of the gas-solid injector. The static pressure in the gas-solid injector will decrease with an increase in the gas nozzle distance S and increase with an increase of the convergent angle α. It is found that with an increase in the gas nozzle outlet speed the maximum static pressure in the gas-solid injector will shift from near the inlet of the injector convergent section to a location near the outlet of the injector convergent section. In addition, the impact of the gas nozzle location, the convergent angle of the convergent section and the conveying air on the static pressure distribution in the convergent type gas-solid injector is correlated to the back pressure of the pneumatic conveying system.

关 键 词：气力输送 气体喷嘴 输送特性 气固喷射器 

分 类 号：TK223.26[动力工程及工程热物理—动力机械及工程]